TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

CRUSTAL SOURCE [1 record]

Record 1 2003-12-10

English

Subject field(s)
  • Metals Mining
  • Geochemistry
  • Petrography
CONT

We can often differentiate between these two sources (crustal and mantle) by examining variations in 34S/32S. ... Originally, all the earth's sulphur was in the mantle. Much of that transferred to the crust has undergone biogenic fractionation ... It is now held to be an oversimplification to claim that for all natural sulphur, a narrow range of [delta]34S close to zero indicates a mantle source, and a wide range of [delta]S34 a crustal source.

CONT

Consistent with this hypothesis of a crustal source of sulphur is the fact that virtually all nickel deposits occur in rocks underlain by continental crust.

French

Domaine(s)
  • Mines métalliques
  • Géochimie
  • Pétrographie
CONT

L'origine des magmas granitiques. La véritable distinction est à faire entre [...] les granites issus de la fusion partielle de la croûte par des processus métamorphiques [...] et [...] les granites issus de la différenciation d'un magma basaltique ou calco-alcalin [...] d'origine sous-crustale (mantellique). Trois cas, que l'on peut distinguer à partir des rapports isotopiques du strontium, sont donc possibles : a) L'origine crustale [...] On peut [...] remarquer que, dans les leucogranites, le rapport 87Sr/86Sr est supérieur à 0,710, alors qu'il n'est que de 0,702 dans le manteau. b) L'origine mantellique [...] c) Origine mixte, mantellique et crustale [...]

CONT

Le fait que les gisements de sulfures de nickel soient pratiquement tous situés dans des roches reposant sur une croûte continentale conforte l'hypothèse voulant que le soufre provienne d'une source crustale.

Spanish

Save record 1

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: